MQ7 CO Carbon Monoxide Coal Gas Sensor Module


MQ7 MQ-7 Carbon Monoxide Coal gas Sensor detects the concentrations of CO in the air and outputs its reading as an analog voltage. The sensor can measure concentrations of 10 to 10,000 ppm and can operate at temperatures from -10 to 50°C and consumes much less than 150 mA at 5V. This module presents each digital and analog output and edge level for virtual output that may be difficulty adjusted with the use of the preset on the board. The MQ-7 sensor module can be easily interfaced with Microcontrollers, Arduino, and many other modules, etc.

Features of MQ7 Sensor

  • The analog output voltage, the higher the concentration the higher the voltage.
  • The carbon monoxide detection with better sensitivity.
  • There are four screw holes for easy positioning;
  • With a long service life and reliable stability
  • Rapid response and recovery characteristics

Pinout of MQ7 Sensor

Pin NameDescription
VCCPower Supply Pin
GNDGround Pin
DOUTDigital Signal Output Pin
AOUTAnalog Signal Output Pin

Specifications of MQ7 Sensor

Product Dimensions32 x 20 x 22 mm (LxWxH)
Operating voltage DC 5 V
IC driverLM 393.
Reaction time ≤ 1 s
Heating current≤ 180 mA.
Heating resistance ± 31ohm 3ohm.
Return time≤ 30 s.
Sensitivity ≥ 3%.
Size11 x 33 x 20 mm.
Range 10 to 1000 ppm.
Characteristic gas100 ppm CO.
Sensitive resistance2 to 20 10kohm 10kohm at 100ppm CO.

Datasheet of MQ7 Sensor

Download (ABC Name) Datasheet from the link given below.

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